Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e951513a918c2c7…

MALICIOUS

PDF

35.5 KB Created: 2020-04-01 11:40:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a6062a998dc14c84703a022e611c846a SHA-1: 158fe41b88389afeb5500110f7fee2e2668b4256 SHA-256: 0e951513a918c2c79c68fad085c734374d6d6a9d10902ea970a554fecc32dcca
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to PDF files hosted on unrelated domains, suggesting a link farm or SEO poisoning tactic. The document body text, though partially obfuscated, mentions 'final draft customer service number', which is a common lure for phishing or scam operations. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://catholicseattle.org/uploads/1/3/0/6/130605344/130605344.html#final+draft+customer+service+number
    • http://flashlet.com/uploads/1/3/0/3/130313657/gujofefisasi.pdf
    • http://mx.syrenkastudios.com/uploads/1/3/0/5/130588861/d8590.pdf
    • http://choreolab.org/uploads/1/3/0/8/130814070/jupugazukotuk.pdf
    • http://got-a-men.com/uploads/1/3/0/4/130488741/ganinumuxigu.pdf
    • http://ahavalife.com/uploads/1/3/0/4/130436037/togelogixunusuwuwuru.pdf
    • http://mixadep.space/uploads/1/3/1/4/131453451/3502132.pdf
    • http://maria-tsiourva.com/uploads/1/3/0/7/130738616/siripexozip.pdf
    • http://athletica4.org/uploads/1/3/1/3/131379320/4478137.pdf
    • http://appletonparenteducation.com/uploads/1/3/0/7/130775131/f546ce324ca68b.pdf
    • http://theresanotherwayout.org/uploads/1/3/0/6/130604358/vofotoriluj.pdf
    • http://tlcpartyhelpers.com/uploads/1/3/0/5/130542870/3031281.pdf
    • http://thisgirlsays.com/uploads/1/3/0/3/130379206/f2a95c87c8fa50.pdf
    • http://minashoppingzone.com/uploads/1/3/1/4/131438129/9399401.pdf
    • http://switchpreston.com/uploads/1/3/0/7/130776275/vonom.pdf
    • http://tutorvirginia.com/uploads/1/3/0/8/130874409/ruturitekafo.pdf
    • http://madeinmb.com/uploads/1/3/0/5/130590353/nematubozukago.pdf
    • http://jonesfamilyweekend.com/uploads/1/3/1/1/131164011/lejazefemilexojut.pdf
    • http://zastrahovkibg.info/uploads/1/3/1/0/131070527/1489126.pdf
    • http://komodia.lol/uploads/1/3/0/5/130546923/dc8a3896a5.pdf
    • http://sosplombier.lu/uploads/1/3/1/1/131163751/fuwixa.pdf
    • http://wit-jp.benq.com/uploads/1/3/0/5/130539691/nanojagegamujip.pdf
    • http://degree.millersville.edu/uploads/1/3/0/2/130291838/3babe3e.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006172.bin
44a8743e2fcbffdab738344b84907d6abf9d982a6ff45ecb4246c86beed1f97d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6172 7516 bytes

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